Method for preparing sulfoxide chloride from industrial chloride salt

Abstract

The invention provides a method for preparing sulfoxide chloride from industrial chloride salt, wherein the method includes the following steps: S1) carrying out a reaction of the industrial chloridesalt with sulfur trioxide at the temperature of 80-200 DEG C to obtain chlorosulfonate; S2) carrying out high temperature cracking of the chlorosulfonate at the temperature of 300-900 DEG C to obtainsulfate, chlorine gas and sulfur dioxide; and S3) mixing the chlorine gas and sulfur dioxide obtained in the S2) with sulfur dichloride, and carrying out a reaction under the catalytic action of activated carbon to obtain sulfoxide chloride. The sulfur trioxide is used as a strong oxidant at high temperature, the residence time of materials is prolonged, waste salt is converted into chlorosulfonate, and organic matters in the waste salt are oxidized to remove in the reaction process; then high temperature cracking is carried out, while chlorine gas and sulfur dioxide with equal moles are obtained, trace organic matters which are not oxidized by sulfur trioxide can be subjected to oxidative decomposition by high temperature again, the organic matters are treated more thoroughly, and sulfoxide chloride can be prepared by adding equimolar sulfur dichloride.

Description

technical field [0001] The invention relates to the technical field of chemical waste post-treatment, in particular to a method for preparing thionyl chloride from industrial chloride salts. Background technique [0002] At present, most chemical enterprises will produce high-salt wastewater in the production process. Through a series of treatments, by-product industrial chloride salts containing a small amount of organic matter can be obtained. This part of the salt is difficult to be effectively treated and utilized, and can only be treated as hazardous waste. Not only has no economic value, but also consumes relatively high processing costs, which cost about 3000-5000 yuan / ton. At present, the main means of disposing of hazardous waste is landfill. If it is accidentally leaked, it will cause secondary pollution. [0003] At present, only a small number of chemical companies can further refine this part of the salt to increase the salt content, but the products obtained b...

AI Technical Summary

Problems solved by technology

According to the market information of thionyl chloride, the current production capacity of thionyl chloride in my country cannot meet the needs of the domestic market, and there is a large gap between supply and demand.

Images